• 대한가정학회지
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• 제47권1호
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• pp.65-73
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• 2009

The present longitudinal study examined reciprocal influence between self-esteem and academic achievement using cross-lagged autoregressive model. This study employed data(four wave) from Korea Youth Panel Survey. Participants were 300 students(143 boys, 157 girls) who were 4th graders in 2004 and 7th graders in 2007. The results of this study indicated that 4th graders' self-esteem influenced 5th graders' academic achievement, in turn, 5th graders' academic achievement influenced 6th graders' self-esteem. However, students' self-esteem in 6th grade did not influence their academic achievement during 7th grade. Conversely, 6th graders' academic achievement influenced 7th graders' self-esteem.

• Clinical and Experimental Pediatrics
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• 제54권1호
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• pp.29-35
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• 2011

Purpose: Korean adolescents have severe nighttime sleep deprivation and daytime sleepiness because of their competitive educational environment. However, daytime sleep patterns and sleepiness have never been studied using age-specific methods, such as the pediatric daytime sleepiness scale (PDSS). We surveyed the daytime sleepiness of Korean adolescents using a Korean translation of the PDSS. Methods: We distributed the 27-item questionnaire, including the PDSS and questions related to sleep pattern, sleep satisfaction, and emotional state, to 3,370 students in grades 5-12. Results: The amount of nighttime sleep decreased significantly with increasing age. During weekday nights, $5-6^{th}$ graders slept for $7.95{\pm}1.05h$, $7-9^{th}$ graders for $7.57{\pm}1.05h$, and $10-12^{th}$ graders for $5.78{\pm}1.13h$. However, the total amounts of combined daytime and nighttime sleep during weekdays were somewhat greater, $8.15{\pm}1.12h$ for $5-6^{th}$ graders, $8.17{\pm}1.20h$ for $7-9^{th}$ graders, and $6.87{\pm}1.40h$ for $10-12^{th}$ graders. PDSS scores increased with age, $11.89{\pm}5.56$ for $5-6^{th}$ graders, $16.57{\pm}5.57$ for $7-9^{th}$ graders, and $17.71{\pm}5.24$ for $10-12^{th}$ graders. Higher PDSS scores were positively correlated with poor school performance and emotional instability. Conclusion: Korean teenagers sleep to an unusual extent during the day because of nighttime sleep deprivation. This negatively affects school performance and emotional stability. A Korean translation of the PDSS was effective in evaluating the severity of daytime sleepiness and assessing the emotional state and school performance of Korean teenagers.

• 한국수학교육학회지시리즈A:수학교육
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• 제42권1호
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• pp.19-39
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• 2003

The purpose of this study is to find out effective ways to take care of the 8th and 10th graders' disposition causing math. disliking. To accomplish this goal, we proceeded as follows : First we categorized the 11 factors recognized as the reasons of math. disliking into 4 math. disliking causes such as psychological f: environmental cause, conceptual cause, relational cause and application related cause. Second, to take care of these tow causes, we developed materials which are closely related with the contents of the 8th and 10th graders' school mathematics. Third with these materials we taught the students who had proved to have the math. disliking trend, for one semester. As a consequence of this experiment we arrived at the following results. As for psychological & environmental causes, 35.7% of the 8th graders and 17% of the 10th graders proved to have been improved significantly. This result shows that the curing of the psychological & environmental causes is more effective in the 8th graders than in the 10th graders. i.e., the curing effects of the students' psychological & environmental cause for disliking math. decline as they get older. As for conceptual causes, 35% of the 5th graders and 30% of the 10th graders proved to have been improved significantly. In case of the 8th graders this ratio was similar to that of the other causes. But as for the 10th graders this ratio was a little low compared with that of the case of relation causes and application related causes. As for relational causes, 35% of the 5th graders and 49% of the 10th graders proved to have been improved significantly. Especially the 10th graders improved greatly. Among the four factors that compose this cause, especially hierarchy and connection factors were effectively cured. On application related causes, 47% of the 5th graders and 57% of the 10th graders proved to have been cured significantly. And among the four types of causes listed above, this was the most successfully cured one. Of the two factors of this cause, the basic application factor appeared to have been improved in all experimental groups. In connection with teaching methods, we found out the followings two facts. First, the more teachers push students to solve their tasks with their own efforts, the higher is the ratio of owe. Second, the more teachers teach students personally, the more effective are the teaching results.

• 대한가정학회지
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• 제48권7호
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• pp.49-57
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• 2010

The purpose of this study was to examine the relationships between children's cheating behaviors and their self-reported orality. For this study, 883 children were selected from 7 elementary schools and from 7 middle schools in Seoul, Korea. The participating students included 4th, 6th and 8th graders. The research was performed through the administration of questionnaires designed to measure the students' cheating behaviors and morality. The results were as follows: 1. The children cheated on occasion. More cheating occurred during homework than while taking an examination. During an examination, there was more lone cheating than students helping other students to cheat. With regard to homework cheating, helping others to cheat was higher than students doing their own cheating. Cheating behavior increased in higher grades, but there was no difference between genders. 2. In relation to children's morality, distinctions between 6th graders, 8th graders and 4th graders were different demonstrated. 3. In relation to cheating behavior and morality (4 factors), while PHIL (interests to others) factor decreased cheating behavior, EMP (understanding of emotion and feeling) factor increased cheating behavior.

• 아동학회지
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• 제31권6호
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• pp.1-13
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• 2010

This study examined the time-dependent effects of changes in private education on the trajectories of academic achievement among early adolescents. Five-wave data was employed from the KYPS; the participants being 2844 (1524 boys, 1320 girls). All were 4th graders in 2004 and became 8th graders in 2008. Latent growth curve model indicated that academic achievement significantly decreased over the five time points, but there were significant individual differences as well. Participants who reported higher initial levels of academic achievement tended to decrease in academic achievement more slowly over time compared to participants who reported lower levels of initial academic achievement. The effects of private education on academic achievement were at their most powerful when participants were in the 4th grade. Private educational experiences among 6th graders had relatively less influence upon the academic achievement of 7th graders.

• 아동학회지
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• 제27권3호
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• pp.135-148
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• 2006

The Foreign Language Classroom Anxiety Scale(Horwitz et al., 1986) and the Classroom Environment Scale(Moos & Tricket, 1974) were administered to 434 middle school students in Daegu. Data were analyzed by Cronbach's $\alpha$, t-test, and Pearson's correlation using the SPSS program. Results on anxiety showed no gender differences between male and female students but $9^{th}$ graders reported more anxiety than $7^{th}$ graders. Two of the nine classroom environment subscales showed differences between perceptions of male and female students, and there were significant differences between $7^{th}$ and $9^{th}$ graders. Foreign language anxiety was correlated with perceived classroom environment. This finding suggests the importance of the psychological environment between the English teacher and students for successful language education.

• 대한지구과학교육학회지
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• 제7권1호
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• pp.64-74
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• 2014

The purpose of this study was to analyze the types of questions of energy field in the elementary science textbooks and to know the preference types of questions of students by grade. To accomplish this study, the analyzing framework on the types of questions was made and ensured the validity. To know students' preference types of questions, a questionnaire was made and the survey was conducted to the students of D elementary school in B city. The results can be summarized as follows: First, of the questions in the elementary science textbooks, the types of limited question were the most frequent(56%) and the next was the type of relevant question(41.82%). In the type of limited question, the element of propositional type was the most frequent and in the type of relevant question, the element of applicable type was the most frequent. Second, from the result of analyzing students' preference types of questions by grade using questionnaire, we could find as follows. Most of the graders chose retrospective type of question as the easy types of questions. And 3, 4, 6th graders chose justificative type and 5th graders chose applicable type as the difficult ones. Third, as interesting type and want-to-select type, 3th graders students chose propositional type and 4, 5th graders chose retrospective type and 6th graders chose inferring type.

• 한국초등과학교육학회지:초등과학교육
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• 제22권1호
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• pp.37-50
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• 2003

The purpose of this study was to develop the quality of the textbook and to find out reasonable selection and structure by examining and analyzing the cognition of teacher and students on the structure and contents of elementary science textbook in the 7th curriculum. The findings of this study were as follows: First, as a result of the students’ cognition, their interest level of the learning contents was high and the degree of the difficulty of the learning contents was low on the whole. Second, as a result of the teachers’ cognition of contents of the textbook, teachers who taught third graders understood that the third graders have relatively much contents to be studied and the level of the contents of the textbook was high. On the other hand, fourth graders’ teachers recognized that contents to be studied and the level of the contents were appropriate. And they understood that there were much work to be studied in the units which were difficult and there were difference between contents to be studied and the degree of the difficulty in some units such as life or the earth fold. Third, as a result of the teachers' cognition of structure of the textbook. teachers were very affirmative to reduce school hours. They understood that current numbers and scale of the unit were appropriate. Teachers were satisfied with the structure of elementary science textbook in the 7th curriculum on the whole.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제11권2호
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• pp.95-103
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• 2008

제7차에서 2007년 개정 수학과 교육과정으로 이행하면서 이에 따라 개발된 교과서를 2009년부터 실행하게 된다. 개정안으로 이행함에 따라 수학과 교육내용의 일부는 학년 간에 이동하였다. 이로 인하여 교육과정 이행 시기 속에 있는 특정 학년도 학생들은 별도의 조치가 없이 도입된다면 일부 내용의 탈락이 예상된다. 본 논문은 2007년 개정 교육과정 이행 시기에 있는 학년별 수학과 교육내용의 이동을 분석하고 이행 시기에 있는 특정 학년도 학생들이 겪게 되는 학년 간 내용 이동에 따른 문제점을 분석하였다. 첫째로, 2007년 개정 수학과 교육과정 이행에 따라 학년 간 이동하는 수학과 교육내용을 영역별로 살펴보고, 둘째로, 2007년 개정 교육과정의 실시 시기에 따라서 특정 학년도 학생들에게 나타나게 될 학년 간 이동에 따른 교육 내용의 탈락을 분석하였다.

• 대한수학교육학회지:학교수학
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• 제1권1호
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• pp.187-216
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• 1999

The purpose of this study is to develop mathematics performance assessment items for the 8th graders and to analyze their performance ability. First, five-themes were selected : 'Calculator', 'Cut and Paste', 'Rule finding', 'Place Assignment', 'My thinking'. Then, the assistance of Mathematics education specialists and Teachers, 10 P. A. items consisting of two subtasks and their evaluation rubric were developed. Then, items were revised by the results of pilot test. And, final version of items were administrated to the 8th graders of three regions(Seoul, Chongiu, Chungp$\acute{y}$ong). Through analyzing the performance ability of the subjects assessment items, the following conclusion were obtained: They were very insufficient in the ability to find some patterns in the given problem situation and to describe logically the patterns in terms of mathematical terminology. It is believed because they were familiar with the objective test to take one or short answer.